It’s surprisingly difficult to prove one of the most basic properties of a number: whether it can be written as a fraction. A broad new method can help settle this ancient question. In June 1978, the ...

For novices, functions are one of the most intimidating features of OpenOffice.org's Calc. Newcomers quickly learn that functions are a main feature of spreadsheets, but there are almost four hundred, ...

One of the most basic and intensively studied processes in biology —- one which has been detailed in biology textbooks for decades —- has gained a new level of understanding, thanks to the application ...